複数ファイルの文字列を並べるコマンドを書きました！(runeflex)

# installation
git clone https://github.com/kis9a/go-runewidth
cd go-runewidth/cmd/runewidth
go install .

# usage
runewidth "💩" # 2

sudo curl -s https://raw.githubusercontent.com/kis9a/runeflex/main/runeflex > /usr/local/bin/runeflex
sudo chmod +x /usr/local/bin/runeflex

USAGE:
  runeflex [options] [argument] [file1] [file...]

OPTIONS:
  -h, --help: show help
  -t, --test: test: runeflex_test
  -b, --border: border char of flexbox
  -g, --gap: gap space of flexbox
  -m, --margin: margin size
  -mx, --margin-x: horizontal margin size
  -my, --margin-y: vertical margin size
  -p, --padding: padding size
  -px, --padding-x: horizontal padding size
  -py, --padding-y: vertical padding size

EXAMPLE:
  runeflex -b # -px 2 -py 1 <(echo "1") <(echo "2\n4") <(echo "3\n5\n6")
  runeflex -g 8 -mx 4 -my 2 <(echo "1") <(echo "2\n4") <(echo "3\n5\n6")
  runeflex -b # -m 2 -py 0 <(echo "a") <(echo "bc\nd")
  runeflex -b $(echo -e "\U1F4A9") -m 0 -p 0 <(echo "a") <(echo "bc金\nd")
  runeflex -g 4 ./file1 ./file2

# coc-settings.json
"diagnostic-languageserver.filetypes": {
  "sh": "shellcheck",
  "bash": "shellcheck"
},
"diagnostic-languageserver.formatFiletypes": {
  "sh": "shfmt",
  "bash": "shfmt",
}

git clone https://github.com/kis9a/runeflex
cd runeflex
./runeflex -t

#!/bin/bash

# flexrn

# input
## s1
## s2
##
## s3

# output
## s1 s3
## s2

IFS=""
in=$(cat -)
files=()
file_count=0
line_count=0

if [[ -z "$1" ]]; then
  CHAR=" "
else
  CHAR="$1"
fi

while read -r line; do
  if [[ "$line" =~ ^$ ]]; then
    ((file_count++))
    line_count=0
  else
    if [[ $line_count -eq 0 ]]; then
      files["$file_count"]="${files["$file_count"]}""$(printf "%s" "$line")"
    else
      files["$file_count"]="${files["$file_count"]}""$(printf "\n%s" "$line")"
    fi
    ((line_count++))
  fi
done <<<"$in"

nfiles=()
count=0
line=""
for f in "${files[@]}"; do
  line_count=0
  while read -r line; do
    if [[ $count -eq 0 ]]; then
      nfiles["$line_count"]="${nfiles["$line_count"]}""$(printf "%s" "$line")"
    else
      nfiles["$line_count"]="${nfiles["$line_count"]}""$(printf "\n%s" "$line")"
    fi
    ((line_count++))
  done <<<"$f"
  ((count++))
done

for fn in "${nfiles[@]}"; do
  line_count=0
  while read -r line; do
    if [[ "$line_count" -eq "$(wc -l <<<"$fn")" ]]; then
      printf "%s" "$line"
    else
      if [[ "$line_count" -eq 0 ]]; then
        printf "%s$CHAR" "$line"
      else
        printf "%s" "$line"
      fi
    fi
    ((line_count++))
  done <<<"$fn"
  printf "\n"
done

echo "1\n2\n\n\n3" | flexrn

# 出力
1 3
2

install_path=/usr/local/bin/runeflexrn
sudo curl -s https://raw.githubusercontent.com/kis9a/runeflex/main/runeflexrn > "$install_path"
chmod +x "$install_path"

:'<,'>!runeflexrn -mx 4 -py 2 -b ab

while getopts ":htpxy" o; do
  case "${o}" in
  x)
    if [[ "$1" == "-x" ]]; then
      if [[ "$#" -lt 2 || "$#" -gt 5 ]]; then
        err_exit "Invalid -x option usage" "$err_code_invalid_option"
      fi
      if is_number "$2"; then
        box_padding_x="$2"
      else
        err_exit "Invalid -x option usage" "$err_code_invalid_option"
      fi
      if [[ -z "$3" ]]; then
        box_char="#"
      elif [[ "$3" == "-y" ]]; then
        if [[ -z "$4" || -n "$6" ]]; then
          err_exit "Invalid -x -y option usage" "$err_code_invalid_option"
        else
          box_padding_y="$4"
          if [[ -n "$5" ]]; then
            box_char="$5"
          else
            box_char="#"
          fi
        fi
      else
        if [[ -n "$4" ]]; then
          err_exit "Invalid -x -y option usage" "$err_code_invalid_option"
        else
          box_char="$3"
        fi
      fi
    fi
    break
    ;;
  y)
    # 省略
    # ...
    ;;
  *)
    err_exit "Invalid option" "$err_code_invalid_option"
    ;;
  esac
done

POSITIONAL_ARGS=()

while [[ $# -gt 0 ]]; do
  case $1 in
    -e|--extension)
      EXTENSION="$2"
      shift # past argument
      shift # past value
      ;;
    -s|--searchpath)
      SEARCHPATH="$2"
      shift # past argument
      shift # past value
      ;;
    --default)
      DEFAULT=YES
      shift # past argument
      ;;
    -*|--*)
      echo "Unknown option $1"
      exit 1
      ;;
    *)
      POSITIONAL_ARGS+=("$1") # save positional arg
      shift # past argument
      ;;
  esac
done

set -- "${POSITIONAL_ARGS[@]}" # restore positional parameters